Metal, metals bronze

The metal is employed to form numerous alloys with other metals. Brass, nickel silver, typewriter metal, commercial bronze, spring bronze, German silver, soft solder, and aluminum solder are some of the more important alloys. 

Alloys of tin are very important. Soft solder, type metal, fusible metal, pewter, bronze, bell metal. Babbitt metal. White metal, die casting alloy, and phosphor bronze are some of the... 

Iron, cobalt, and nickel catalyze this reaction. The rate depends on temperature and sodium concentration. At —33.5°C, 0.251 kg sodium is soluble in 1 kg ammonia. Concentrated solutions of sodium in ammonia separate into two Hquid phases when cooled below the consolute temperature of —41.6°C. The compositions of the phases depend on the temperature. At the peak of the conjugate solutions curve, the composition is 4.15 atom % sodium. The density decreases with increasing concentration of sodium. Thus, in the two-phase region the dilute bottom phase, low in sodium concentration, has a deep-blue color the light top phase, high in sodium concentration, has a metallic bronze appearance (9—13). 

Brumerbeize, /. (Metal.) bronzing pickle, brumeren, brUnieren, v.t. burnish, polish ... 

Erweiterung,/. widening, etc. (see erweitern). Erwerb, m. acquisition gain, profit industry, erwerben, v.t. acquire earn, gain, erwidern, v.t. return reply, erwies, pret. (of erweisen) proved, showed, erwiiiischt, p.a. wished for, desired agreeable. Erz, n. ore metal, esp. bronze, erz-. (with adjectives) extremely. 

They must be readily accessible for cleaning, which should be carried out as frequently as necessary to ensure that pressure drop across the filter does not affect normal oil flow rates. The filtering medium should be of corrosion-resistant material such as Monel metal, phosphor-bronze or stainless steel. All first-stage filters should be provided with isolating valves. 

The alkali metals also release their valence electrons when they dissolve in liquid ammonia, but the outcome is different. Instead of reducing the ammonia, the electrons occupy cavities formed by groups of NH3 molecules and give ink-blue metal-ammonia solutions (Fig. 14.14). These solutions of solvated electrons (and cations of the metal) are often used to reduce organic compounds. As the metal concentration is increased, the blue gives way to a metallic bronze, and the solutions begin to conduct electricity like liquid metals. 

Conservation of Cupreous Metals (Copper, Bronze, Brass). http //nautarch.tamu.edu/class/anth605/File12.htm... 

Today s major use of tin is for tin cans used for preserving foods and beverages. Other important uses are solder alloys, bearing metals, bronzes, pewter and miscellaneous industrial alloys. 

Copper and its nonferrous metal alloys, bronze and brass, are used to manufacture tubing, ferrules, valves, and a variety of fittings. Although their use is somewhat limited in automotive fuel systems, they are found commonly throughout fuel storage and distribution systems. Copper steam coils and brass hardware may be utilized due to their excellent resistance to corrosion and high level of thermal conductivity. Described below are some of the more common alloys of copper and their applications ... 

The M-NM transition has been a topic of interest from the days of Sir Humphry Davy when sodium and potassium were discovered till then only high-density elements such as Au, Ag and Cu with lustre and other related properties were known to be metallic. A variety of materials exhibit a transition from the nonmetallic to the metallic state because of a change in crystal structure, composition, temperature or pressure. While the majority of elements in nature are metallic, some of the elements which are ordinarily nonmetals become metallic on application of pressure or on melting accordingly, silicon is metallic in the liquid state and nonmetallic in the solid state. Metals such as Cs and Hg become nonmetallic when expanded to low densities at high temperatures. Solutions of alkali metals in liquid ammonia become metallic when the concentration of the alkali metal is sufficiently high. Alkali metal tungsten bronzes... 

Berthelot also found that the most ancient articles of Egyptian origin are of copper without addition of other metals. Bronzes of copper and tin he finds as early as the sixth dynasty. Indeed, in a weathered metal fragment from a tomb of the third dynasty, according to Masperot, he found a very considerable admixture of tin, the quantity being sufficient to serve as rather conclusive evidence... 

More recently the transformation of carbon-supported Pt colloids of approximately 1 nm diameter into Pt alloys has been reported, which seems to yield an even better catalyst, since the alloy particles—although coarser than the initial Pt particles—show improved catalytic activity and stability. It is not unlikely that from these alloys by in-situ oxidation transition-metal platinum bronzes like NLPt304 are formed, being the catalysts proper. 

The color of most Pc s ranges from blue-black to metallic bronze, depending on the manufacturing process. Ground powders exhibit colors from green to blue. Most compounds do not melt but sublime above 200°C, which can be used for purification. 

Alkali metal bronzes of lower x value have not been so extensively studied. With the exception of some measurements by Sienko and Truong (8) of the... 

One of the chief wonders of alloys is how a small amount of impurities can have such an exaggerated effect on the properties of the parent metal. Bronze is one example. Although there are many kinds of bronze, involving different concentrations of several elements, one common bronze alloy contains 90% copper and 10% tin. The combination of these two metals creates an alloy that is much stronger and harder than either of its components. Why should the addition of soft, weak tin to copper result in a substance stronger and harder than pure copper The answer lies in the nature of alloys. 

Metal Artifacts—Bronze, Copper, Iron, Steel, Lead Coins (Au, Cu, Ag)... 

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